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Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction
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Published on: February 13, 2021

Autonomic-cardiorespiratory regulation: a physiology-based mathematical model.

Pedram Ataee1, Loïc Belingard, Guy A Dumont

  • 1Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, Canada. pedrama@ece.ubc.ca

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|February 1, 2013
PubMed
Summary

This study introduces a new mathematical model for autonomic-cardiorespiratory regulation. The model reveals venous return variation significantly impacts heart rate and blood pressure more than lung stretch-receptor reflexes.

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Area of Science:

  • Physiology
  • Mathematical Modeling
  • Cardiorespiratory Regulation

Background:

  • Autonomic nervous system control of heart rate and respiration is complex.
  • Previous models have not fully integrated cardiovascular and respiratory system mechanics.
  • Understanding neuromechanical coupling is crucial for accurate physiological modeling.

Purpose of the Study:

  • To develop a novel, physiology-based mathematical model of autonomic-cardiorespiratory regulation.
  • To investigate the interplay between cardiovascular and respiratory systems, including lung stretch-receptor reflex and venous return variation.
  • To accurately quantify parasympathetic activity by accounting for respiratory influences.

Main Methods:

  • Developed a set of three nonlinear, coupled differential equations.
  • Integrated neuromechanical and mechanical coupling between cardiovascular and respiratory systems.
  • Introduced a differential equation for respiration rate regulation originating in the medullary respiratory center.

Main Results:

  • Simulation results indicate venous return variation causes greater perturbation on heart rate and blood pressure compared to the lung stretch-receptor reflex.
  • The model effectively distinguishes and removes direct respiratory impacts on parasympathetic activation.
  • Accurate extraction of parasympathetic activity related to emotional states and environmental factors is demonstrated.

Conclusions:

  • The proposed mathematical model provides a comprehensive framework for understanding autonomic-cardiorespiratory interactions.
  • Venous return variation plays a critical role in cardiovascular regulation.
  • The model enables precise assessment of parasympathetic tone, independent of respiratory artifacts.